Abstract: A caster device pair for use with a ladder including a pair of parallel stiles and a plurality of rungs extending therebetween, each stile having a stile bottom for placing on a flat surface and a stile top opposite the stile bottom, the ladder including a top rung extending between the pair of stile tops and a bottom rung extending between the pair of stile bottoms, the ladder including a stabilizer attached to the stile bottoms, the stabilizer having a stabilizer end pair outwardly extending widthwise beyond the stile bottoms, the ladder resting on the stabilizer in upright use, the caster device pair comprising a pair of caster devices for correspondingly clamping on the stabilizer end pair, said pair of caster devices being fixedly inclined away from the stabilizer toward the top rung, whereby the ladder rests on the stabilizer in upright use and rests on said caster wheel pair during wheeling a generally horizontal ladder.

Abstract: Measurement devices for measuring and marking purposes and including an integral angle finder for enabling two modes of use: placing either major body surface on a flat surface or setting a base on an inclined surface for indicating its inclination. Spirit levels for setting a spaced apart pair of adjacent upright studs of more than one standard stud width at a standard stud separation between the midpoints of spaced apart pair or upright studs. Caster device pair for use with a ladder having a stabilizer for enabling wheeling the ladder while being held generally horizontal by a user for assisting moving the ladder without having to lift its entire weight.

Abstract: Measurement devices (50) for measuring and marking purposes and including an integral angle finder (71) for enabling two modes of use: placing either major body surface (66, 67) on a flat surface or setting a base (51) on an inclined surface for indicating its inclination. Spirit levels (100A) for setting a spaced apart pair of adjacent upright studs of more than one standard stud width at a standard stud separation between the midpoints of spaced apart pair or upright studs. Caster device pair (220) for use with a ladder (200) having a stabilizer (206) for enabling wheeling the ladder (200) while being held generally horizontal by a user for assisting moving the ladder (200) without having to lift its entire weight.